/***** BEGIN LICENSE BLOCK *****
* Version: CPL 1.0/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Common Public
* License Version 1.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.eclipse.org/legal/cpl-v10.html
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* Copyright (C) 2002 Benoit Cerrina <b.cerrina@wanadoo.fr>
* Copyright (C) 2002-2004 Anders Bengtsson <ndrsbngtssn@yahoo.se>
* Copyright (C) 2002-2004 Jan Arne Petersen <jpetersen@uni-bonn.de>
* Copyright (C) 2004 Charles O Nutter <headius@headius.com>
* Copyright (C) 2004 Thomas E Enebo <enebo@acm.org>
* Copyright (C) 2004 Stefan Matthias Aust <sma@3plus4.de>
* Copyright (C) 2006 Tim Azzopardi <tim@tigerfive.com>
* Copyright (C) 2006 Miguel Covarrubias <mlcovarrubias@gmail.com>
* Copyright (C) 2006 Michael Studman <codehaus@michaelstudman.com>
* Copyright (C) 2008 Joseph LaFata <joe@quibb.org>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the CPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the CPL, the GPL or the LGPL.
***** END LICENSE BLOCK *****/
package org.jruby;
import org.jruby.util.io.STDIO;
import java.util.HashMap;
import java.util.Map;
import org.jcodings.Encoding;
import org.jruby.anno.JRubyMethod;
import org.jruby.common.IRubyWarnings.ID;
import org.jruby.ext.posix.POSIX;
import org.jruby.util.OSEnvironment;
import org.jruby.internal.runtime.ValueAccessor;
import org.jruby.javasupport.JavaUtil;
import org.jruby.javasupport.util.RuntimeHelpers;
import org.jruby.platform.Platform;
import org.jruby.runtime.Constants;
import org.jruby.runtime.GlobalVariable;
import org.jruby.runtime.IAccessor;
import org.jruby.runtime.ReadonlyGlobalVariable;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;
import org.jruby.util.ByteList;
import org.jruby.util.KCode;
import org.jruby.util.RegexpOptions;
import org.jruby.util.io.BadDescriptorException;
/** This class initializes global variables and constants.
*
* @author jpetersen
*/
public class RubyGlobal {
/**
* Obligate string-keyed and string-valued hash, used for ENV.
* On Windows, the keys are case-insensitive for ENV
*
*/
public static class CaseInsensitiveStringOnlyRubyHash extends StringOnlyRubyHash {
public CaseInsensitiveStringOnlyRubyHash(Ruby runtime, Map valueMap, IRubyObject defaultValue) {
super(runtime, valueMap, defaultValue, true);
}
@Override
public IRubyObject op_aref(ThreadContext context, IRubyObject key) {
return case_aware_op_aref(context, key, false);
}
@Override
public IRubyObject op_aset(ThreadContext context, IRubyObject key, IRubyObject value) {
return case_aware_op_aset(context, key, value, false);
}
@JRubyMethod
@Override
public IRubyObject to_s(){
return getRuntime().newString("ENV");
}
}
/**
* A Pseudo-hash whose keys and values are required to be Strings.
* On all platforms, the keys are case-sensitive.
* Used for ENV_JAVA.
*/
public static class StringOnlyRubyHash extends RubyHash {
// This is an ugly hack. Windows ENV map processing all happens in this
// class and not in the caseinsensitive hash. In order to not refactor
// both of these maps we will pass in a flag to specify whether we want
// the op_aset to also update the real ENV map via setenv/unsetenv.
private boolean updateRealENV;
public StringOnlyRubyHash(Ruby runtime, Map valueMap, IRubyObject defaultValue, boolean updateRealENV) {
super(runtime, valueMap, defaultValue);
this.updateRealENV = updateRealENV;
}
public StringOnlyRubyHash(Ruby runtime, Map valueMap, IRubyObject defaultValue) {
this(runtime, valueMap, defaultValue, false);
}
@Override
public IRubyObject op_aref(ThreadContext context, IRubyObject key) {
return case_aware_op_aref(context, key, true);
}
@Override
public RubyHash to_hash() {
Ruby runtime = getRuntime();
RubyHash hash = RubyHash.newHash(runtime);
hash.replace(runtime.getCurrentContext(), this);
return hash;
}
@Override
public IRubyObject op_aset(ThreadContext context, IRubyObject key, IRubyObject value) {
return case_aware_op_aset(context, key, value, true);
}
@Override
public IRubyObject op_aset19(ThreadContext context, IRubyObject key, IRubyObject value) {
return op_aset(context, key, value);
}
protected IRubyObject case_aware_op_aref(ThreadContext context, IRubyObject key, boolean caseSensitive) {
if (! caseSensitive) {
key = getCorrectKey(key, context);
}
return super.op_aref(context, key);
}
protected IRubyObject case_aware_op_aset(ThreadContext context, IRubyObject key, IRubyObject value, boolean caseSensitive) {
if (!key.respondsTo("to_str")) {
throw getRuntime().newTypeError("can't convert " + key.getMetaClass() + " into String");
}
if (!value.respondsTo("to_str") && !value.isNil()) {
throw getRuntime().newTypeError("can't convert " + value.getMetaClass() + " into String");
}
if (! caseSensitive) {
key = getCorrectKey(key, context);
}
if (value.isNil()) {
return super.delete(context, key, org.jruby.runtime.Block.NULL_BLOCK);
}
IRubyObject keyAsStr = normalizeEnvString(RuntimeHelpers.invoke(context, key, "to_str"));
IRubyObject valueAsStr = value.isNil() ? getRuntime().getNil() :
normalizeEnvString(RuntimeHelpers.invoke(context, value, "to_str"));
if (updateRealENV) {
POSIX posix = getRuntime().getPosix();
String keyAsJava = keyAsStr.asJavaString();
if (valueAsStr == getRuntime().getNil()) {
posix.unsetenv(keyAsJava);
} else {
posix.setenv(keyAsJava, valueAsStr.asJavaString(), 1);
}
}
return super.op_aset(context, keyAsStr, valueAsStr);
}
private RubyString getCorrectKey(IRubyObject key, ThreadContext context) {
RubyString originalKey = key.convertToString();
RubyString actualKey = originalKey;
Ruby runtime = context.getRuntime();
if (Platform.IS_WINDOWS) {
// this is a rather ugly hack, but similar to MRI. See hash.c:ruby_setenv and similar in MRI
// we search all keys for a case-insensitive match, and use that
RubyArray keys = super.keys();
for (int i = 0; i < keys.size(); i++) {
RubyString candidateKey = keys.eltInternal(i).convertToString();
if (candidateKey.casecmp(context, originalKey).op_equal(context, RubyFixnum.zero(runtime)).isTrue()) {
actualKey = candidateKey;
break;
}
}
}
return actualKey;
}
private IRubyObject normalizeEnvString(IRubyObject str) {
if (str instanceof RubyString) {
Encoding enc = getRuntime().getEncodingService().getLocaleEncoding();
RubyString newStr = getRuntime().newString(new ByteList(str.toString().getBytes(), enc));
newStr.setFrozen(true);
return newStr;
} else {
return str;
}
}
}
public static void createGlobals(ThreadContext context, Ruby runtime) {
runtime.defineGlobalConstant("TOPLEVEL_BINDING", runtime.newBinding());
runtime.defineGlobalConstant("TRUE", runtime.getTrue());
runtime.defineGlobalConstant("FALSE", runtime.getFalse());
runtime.defineGlobalConstant("NIL", runtime.getNil());
// define ARGV and $* for this runtime
RubyArray argvArray = runtime.newArray();
String[] argv = runtime.getInstanceConfig().getArgv();
for (int i = 0; i < argv.length; i++) {
argvArray.append(RubyString.newStringShared(runtime, argv[i].getBytes()));
}
runtime.defineGlobalConstant("ARGV", argvArray);
runtime.getGlobalVariables().defineReadonly("$*", new ValueAccessor(argvArray));
IAccessor d = new ValueAccessor(runtime.newString(
runtime.getInstanceConfig().displayedFileName()));
runtime.getGlobalVariables().define("$PROGRAM_NAME", d);
runtime.getGlobalVariables().define("$0", d);
// Version information:
IRubyObject version = null;
IRubyObject patchlevel = null;
IRubyObject release = runtime.newString(Constants.COMPILE_DATE).freeze(context);
IRubyObject platform = runtime.newString(Constants.PLATFORM).freeze(context);
IRubyObject engine = runtime.newString(Constants.ENGINE).freeze(context);
switch (runtime.getInstanceConfig().getCompatVersion()) {
case RUBY1_8:
version = runtime.newString(Constants.RUBY_VERSION).freeze(context);
patchlevel = runtime.newFixnum(Constants.RUBY_PATCHLEVEL);
break;
case RUBY1_9:
version = runtime.newString(Constants.RUBY1_9_VERSION).freeze(context);
patchlevel = runtime.newFixnum(Constants.RUBY1_9_PATCHLEVEL);
break;
}
runtime.defineGlobalConstant("RUBY_VERSION", version);
runtime.defineGlobalConstant("RUBY_PATCHLEVEL", patchlevel);
runtime.defineGlobalConstant("RUBY_RELEASE_DATE", release);
runtime.defineGlobalConstant("RUBY_PLATFORM", platform);
runtime.defineGlobalConstant("RUBY_ENGINE", engine);
IRubyObject description = runtime.newString(runtime.getInstanceConfig().getVersionString()).freeze(context);
runtime.defineGlobalConstant("RUBY_DESCRIPTION", description);
IRubyObject copyright = runtime.newString(runtime.getInstanceConfig().getCopyrightString()).freeze(context);
runtime.defineGlobalConstant("RUBY_COPYRIGHT", copyright);
runtime.defineGlobalConstant("VERSION", version);
runtime.defineGlobalConstant("RELEASE_DATE", release);
runtime.defineGlobalConstant("PLATFORM", platform);
IRubyObject jrubyVersion = runtime.newString(Constants.VERSION).freeze(context);
IRubyObject jrubyRevision = runtime.newString(Constants.REVISION).freeze(context);
runtime.defineGlobalConstant("JRUBY_VERSION", jrubyVersion);
runtime.defineGlobalConstant("JRUBY_REVISION", jrubyRevision);
if (runtime.is1_9()) {
// needs to be a fixnum, but our revision is a sha1 hash from git
runtime.defineGlobalConstant("RUBY_REVISION", runtime.newFixnum(Constants.RUBY1_9_REVISION));
}
GlobalVariable kcodeGV = new KCodeGlobalVariable(runtime, "$KCODE", runtime.newString("NONE"));
runtime.defineVariable(kcodeGV);
runtime.defineVariable(new GlobalVariable.Copy(runtime, "$-K", kcodeGV));
IRubyObject defaultRS = runtime.newString(runtime.getInstanceConfig().getRecordSeparator()).freeze(context);
GlobalVariable rs = new StringGlobalVariable(runtime, "$/", defaultRS);
runtime.defineVariable(rs);
runtime.setRecordSeparatorVar(rs);
runtime.getGlobalVariables().setDefaultSeparator(defaultRS);
runtime.defineVariable(new StringGlobalVariable(runtime, "$\\", runtime.getNil()));
runtime.defineVariable(new StringGlobalVariable(runtime, "$,", runtime.getNil()));
runtime.defineVariable(new LineNumberGlobalVariable(runtime, "$."));
runtime.defineVariable(new LastlineGlobalVariable(runtime, "$_"));
runtime.defineVariable(new LastExitStatusVariable(runtime, "$?"));
runtime.defineVariable(new ErrorInfoGlobalVariable(runtime, "$!", runtime.getNil()));
runtime.defineVariable(new NonEffectiveGlobalVariable(runtime, "$=", runtime.getFalse()));
if(runtime.getInstanceConfig().getInputFieldSeparator() == null) {
runtime.defineVariable(new GlobalVariable(runtime, "$;", runtime.getNil()));
} else {
runtime.defineVariable(new GlobalVariable(runtime, "$;", RubyRegexp.newRegexp(runtime, runtime.getInstanceConfig().getInputFieldSeparator(), new RegexpOptions())));
}
Boolean verbose = runtime.getInstanceConfig().getVerbose();
IRubyObject verboseValue = null;
if (verbose == null) {
verboseValue = runtime.getNil();
} else if(verbose == Boolean.TRUE) {
verboseValue = runtime.getTrue();
} else {
verboseValue = runtime.getFalse();
}
runtime.defineVariable(new VerboseGlobalVariable(runtime, "$VERBOSE", verboseValue));
IRubyObject debug = runtime.newBoolean(runtime.getInstanceConfig().isDebug());
runtime.defineVariable(new DebugGlobalVariable(runtime, "$DEBUG", debug));
runtime.defineVariable(new DebugGlobalVariable(runtime, "$-d", debug));
runtime.defineVariable(new SafeGlobalVariable(runtime, "$SAFE"));
runtime.defineVariable(new BacktraceGlobalVariable(runtime, "$@"));
IRubyObject stdin = new RubyIO(runtime, STDIO.IN);
IRubyObject stdout = new RubyIO(runtime, STDIO.OUT);
IRubyObject stderr = new RubyIO(runtime, STDIO.ERR);
runtime.defineVariable(new InputGlobalVariable(runtime, "$stdin", stdin));
runtime.defineVariable(new OutputGlobalVariable(runtime, "$stdout", stdout));
runtime.getGlobalVariables().alias("$>", "$stdout");
runtime.getGlobalVariables().alias("$defout", "$stdout");
runtime.defineVariable(new OutputGlobalVariable(runtime, "$stderr", stderr));
runtime.getGlobalVariables().alias("$deferr", "$stderr");
runtime.defineGlobalConstant("STDIN", stdin);
runtime.defineGlobalConstant("STDOUT", stdout);
runtime.defineGlobalConstant("STDERR", stderr);
runtime.defineVariable(new LoadedFeatures(runtime, "$\""));
runtime.defineVariable(new LoadedFeatures(runtime, "$LOADED_FEATURES"));
runtime.defineVariable(new LoadPath(runtime, "$:"));
runtime.defineVariable(new LoadPath(runtime, "$-I"));
runtime.defineVariable(new LoadPath(runtime, "$LOAD_PATH"));
runtime.defineVariable(new MatchMatchGlobalVariable(runtime, "$&"));
runtime.defineVariable(new PreMatchGlobalVariable(runtime, "$`"));
runtime.defineVariable(new PostMatchGlobalVariable(runtime, "$'"));
runtime.defineVariable(new LastMatchGlobalVariable(runtime, "$+"));
runtime.defineVariable(new BackRefGlobalVariable(runtime, "$~"));
// On platforms without a c-library accessable through JNA, getpid will return hashCode
// as $$ used to. Using $$ to kill processes could take down many runtimes, but by basing
// $$ on getpid() where available, we have the same semantics as MRI.
runtime.getGlobalVariables().defineReadonly("$$", new PidAccessor(runtime));
// after defn of $stderr as the call may produce warnings
defineGlobalEnvConstants(runtime);
// Fixme: Do we need the check or does Main.java not call this...they should consolidate
if (runtime.getGlobalVariables().get("$*").isNil()) {
runtime.getGlobalVariables().defineReadonly("$*", new ValueAccessor(runtime.newArray()));
}
runtime.getGlobalVariables().defineReadonly("$-p",
new ValueAccessor(runtime.newBoolean(runtime.getInstanceConfig().isAssumePrinting())));
runtime.getGlobalVariables().defineReadonly("$-a",
new ValueAccessor(runtime.newBoolean(runtime.getInstanceConfig().isSplit())));
runtime.getGlobalVariables().defineReadonly("$-l",
new ValueAccessor(runtime.newBoolean(runtime.getInstanceConfig().isProcessLineEnds())));
// ARGF, $< object
RubyArgsFile.initArgsFile(runtime);
}
private static void defineGlobalEnvConstants(Ruby runtime) {
Map environmentVariableMap = null;
OSEnvironment environment = new OSEnvironment();
environmentVariableMap = environment.getEnvironmentVariableMap(runtime);
if (environmentVariableMap == null) {
// if the environment variables can't be obtained, define an empty ENV
environmentVariableMap = new HashMap();
}
CaseInsensitiveStringOnlyRubyHash h1 = new CaseInsensitiveStringOnlyRubyHash(runtime,
environmentVariableMap, runtime.getNil());
h1.getSingletonClass().defineAnnotatedMethods(CaseInsensitiveStringOnlyRubyHash.class);
runtime.defineGlobalConstant("ENV", h1);
runtime.setENV(h1);
// Define System.getProperties() in ENV_JAVA
Map systemProps = environment.getSystemPropertiesMap(runtime);
runtime.defineGlobalConstant("ENV_JAVA", new StringOnlyRubyHash(
runtime, systemProps, runtime.getNil()));
}
private static class NonEffectiveGlobalVariable extends GlobalVariable {
public NonEffectiveGlobalVariable(Ruby runtime, String name, IRubyObject value) {
super(runtime, name, value);
}
@Override
public IRubyObject set(IRubyObject value) {
runtime.getWarnings().warn(ID.INEFFECTIVE_GLOBAL, "warning: variable " + name + " is no longer effective; ignored");
return value;
}
@Override
public IRubyObject get() {
runtime.getWarnings().warn(ID.INEFFECTIVE_GLOBAL, "warning: variable " + name + " is no longer effective");
return runtime.getFalse();
}
}
private static class LastExitStatusVariable extends GlobalVariable {
public LastExitStatusVariable(Ruby runtime, String name) {
super(runtime, name, runtime.getNil());
}
@Override
public IRubyObject get() {
IRubyObject lastExitStatus = runtime.getCurrentContext().getLastExitStatus();
return lastExitStatus == null ? runtime.getNil() : lastExitStatus;
}
@Override
public IRubyObject set(IRubyObject lastExitStatus) {
throw runtime.newNameError("$? is a read-only variable", "$?");
}
}
private static class MatchMatchGlobalVariable extends GlobalVariable {
public MatchMatchGlobalVariable(Ruby runtime, String name) {
super(runtime, name, runtime.getNil());
}
@Override
public IRubyObject get() {
return RubyRegexp.last_match(runtime.getCurrentContext().getCurrentScope().getBackRef(runtime));
}
}
private static class PreMatchGlobalVariable extends GlobalVariable {
public PreMatchGlobalVariable(Ruby runtime, String name) {
super(runtime, name, runtime.getNil());
}
@Override
public IRubyObject get() {
return RubyRegexp.match_pre(runtime.getCurrentContext().getCurrentScope().getBackRef(runtime));
}
}
private static class PostMatchGlobalVariable extends GlobalVariable {
public PostMatchGlobalVariable(Ruby runtime, String name) {
super(runtime, name, runtime.getNil());
}
@Override
public IRubyObject get() {
return RubyRegexp.match_post(runtime.getCurrentContext().getCurrentScope().getBackRef(runtime));
}
}
private static class LastMatchGlobalVariable extends GlobalVariable {
public LastMatchGlobalVariable(Ruby runtime, String name) {
super(runtime, name, runtime.getNil());
}
@Override
public IRubyObject get() {
return RubyRegexp.match_last(runtime.getCurrentContext().getCurrentScope().getBackRef(runtime));
}
}
private static class BackRefGlobalVariable extends GlobalVariable {
public BackRefGlobalVariable(Ruby runtime, String name) {
super(runtime, name, runtime.getNil());
}
@Override
public IRubyObject get() {
return RuntimeHelpers.getBackref(runtime, runtime.getCurrentContext());
}
@Override
public IRubyObject set(IRubyObject value) {
RuntimeHelpers.setBackref(runtime, runtime.getCurrentContext(), value);
return value;
}
}
// Accessor methods.
private static class LineNumberGlobalVariable extends GlobalVariable {
public LineNumberGlobalVariable(Ruby runtime, String name) {
super(runtime, name, null);
}
@Override
public IRubyObject set(IRubyObject value) {
int line = (int)value.convertToInteger().getLongValue();
runtime.setCurrentLine(line);
RubyArgsFile.setCurrentLineNumber(runtime.getArgsFile(), line);
return value;
}
@Override
public IRubyObject get() {
return runtime.newFixnum(runtime.getCurrentLine());
}
}
private static class ErrorInfoGlobalVariable extends GlobalVariable {
public ErrorInfoGlobalVariable(Ruby runtime, String name, IRubyObject value) {
super(runtime, name, null);
set(value);
}
@Override
public IRubyObject set(IRubyObject value) {
if (!value.isNil() &&
!runtime.getException().isInstance(value) &&
!(JavaUtil.isJavaObject(value) && JavaUtil.unwrapJavaObject(value) instanceof Throwable)) {
throw runtime.newTypeError("assigning non-exception to $!");
}
return runtime.getCurrentContext().setErrorInfo(value);
}
@Override
public IRubyObject get() {
return runtime.getCurrentContext().getErrorInfo();
}
}
// FIXME: move out of this class!
public static class StringGlobalVariable extends GlobalVariable {
public StringGlobalVariable(Ruby runtime, String name, IRubyObject value) {
super(runtime, name, value);
}
@Override
public IRubyObject set(IRubyObject value) {
if (!value.isNil() && ! (value instanceof RubyString)) {
throw runtime.newTypeError("value of " + name() + " must be a String");
}
return super.set(value);
}
}
public static class KCodeGlobalVariable extends GlobalVariable {
public KCodeGlobalVariable(Ruby runtime, String name, IRubyObject value) {
super(runtime, name, value);
}
@Override
public IRubyObject get() {
return runtime.getKCode().kcode(runtime);
}
@Override
public IRubyObject set(IRubyObject value) {
runtime.setKCode(KCode.create(runtime, value.convertToString().toString()));
return value;
}
}
private static class SafeGlobalVariable extends GlobalVariable {
public SafeGlobalVariable(Ruby runtime, String name) {
super(runtime, name, null);
}
@Override
public IRubyObject get() {
return runtime.newFixnum(runtime.getSafeLevel());
}
@Override
public IRubyObject set(IRubyObject value) {
// int level = RubyNumeric.fix2int(value);
// if (level < runtime.getSafeLevel()) {
// throw runtime.newSecurityError("tried to downgrade safe level from " +
// runtime.getSafeLevel() + " to " + level);
// }
// runtime.setSafeLevel(level);
// thread.setSafeLevel(level);
runtime.getWarnings().warn(ID.SAFE_NOT_SUPPORTED, "SAFE levels are not supported in JRuby");
return RubyFixnum.newFixnum(runtime, runtime.getSafeLevel());
}
}
private static class VerboseGlobalVariable extends GlobalVariable {
public VerboseGlobalVariable(Ruby runtime, String name, IRubyObject initialValue) {
super(runtime, name, initialValue);
set(initialValue);
}
@Override
public IRubyObject get() {
return runtime.getVerbose();
}
@Override
public IRubyObject set(IRubyObject newValue) {
if (newValue.isNil()) {
runtime.setVerbose(newValue);
} else {
runtime.setVerbose(runtime.newBoolean(newValue.isTrue()));
}
return newValue;
}
}
private static class DebugGlobalVariable extends GlobalVariable {
public DebugGlobalVariable(Ruby runtime, String name, IRubyObject initialValue) {
super(runtime, name, initialValue);
set(initialValue);
}
@Override
public IRubyObject get() {
return runtime.getDebug();
}
@Override
public IRubyObject set(IRubyObject newValue) {
if (newValue.isNil()) {
runtime.setDebug(newValue);
} else {
runtime.setDebug(runtime.newBoolean(newValue.isTrue()));
}
return newValue;
}
}
private static class BacktraceGlobalVariable extends GlobalVariable {
public BacktraceGlobalVariable(Ruby runtime, String name) {
super(runtime, name, null);
}
@Override
public IRubyObject get() {
IRubyObject errorInfo = runtime.getGlobalVariables().get("$!");
IRubyObject backtrace = errorInfo.isNil() ? runtime.getNil() : errorInfo.callMethod(errorInfo.getRuntime().getCurrentContext(), "backtrace");
//$@ returns nil if $!.backtrace is not an array
if (!(backtrace instanceof RubyArray)) {
backtrace = runtime.getNil();
}
return backtrace;
}
@Override
public IRubyObject set(IRubyObject value) {
if (runtime.getGlobalVariables().get("$!").isNil()) {
throw runtime.newArgumentError("$! not set.");
}
runtime.getGlobalVariables().get("$!").callMethod(value.getRuntime().getCurrentContext(), "set_backtrace", value);
return value;
}
}
private static class LastlineGlobalVariable extends GlobalVariable {
public LastlineGlobalVariable(Ruby runtime, String name) {
super(runtime, name, null);
}
@Override
public IRubyObject get() {
return RuntimeHelpers.getLastLine(runtime, runtime.getCurrentContext());
}
@Override
public IRubyObject set(IRubyObject value) {
RuntimeHelpers.setLastLine(runtime, runtime.getCurrentContext(), value);
return value;
}
}
public static class InputGlobalVariable extends GlobalVariable {
public InputGlobalVariable(Ruby runtime, String name, IRubyObject value) {
super(runtime, name, value);
}
@Override
public IRubyObject set(IRubyObject value) {
if (value == get()) {
return value;
}
return super.set(value);
}
}
public static class OutputGlobalVariable extends GlobalVariable {
public OutputGlobalVariable(Ruby runtime, String name, IRubyObject value) {
super(runtime, name, value);
}
@Override
public IRubyObject set(IRubyObject value) {
if (value == get()) {
return value;
}
if (value instanceof RubyIO) {
RubyIO io = (RubyIO)value;
// HACK: in order to have stdout/err act like ttys and flush always,
// we set anything assigned to stdout/stderr to sync
try {
io.getOpenFile().getWriteStreamSafe().setSync(true);
} catch (BadDescriptorException e) {
throw runtime.newErrnoEBADFError();
}
}
if (!value.respondsTo("write")) {
throw runtime.newTypeError(name() + " must have write method, " +
value.getType().getName() + " given");
}
return super.set(value);
}
}
private static class LoadPath extends ReadonlyGlobalVariable {
public LoadPath(Ruby runtime, String name) {
super(runtime, name, null);
}
/**
* @see org.jruby.runtime.GlobalVariable#get()
*/
@Override
public IRubyObject get() {
return runtime.getLoadService().getLoadPath();
}
}
private static class LoadedFeatures extends ReadonlyGlobalVariable {
public LoadedFeatures(Ruby runtime, String name) {
super(runtime, name, null);
}
/**
* @see org.jruby.runtime.GlobalVariable#get()
*/
@Override
public IRubyObject get() {
return runtime.getLoadService().getLoadedFeatures();
}
}
/**
* A special accessor for getpid, to avoid loading the posix subsystem until
* it is needed.
*/
private static final class PidAccessor implements IAccessor {
private final Ruby runtime;
private IRubyObject pid = null;
public PidAccessor(Ruby runtime) {
this.runtime = runtime;
}
public IRubyObject getValue() {
return pid != null ? pid : (pid = runtime.newFixnum(runtime.getPosix().getpid()));
}
public IRubyObject setValue(IRubyObject newValue) {
throw runtime.newRuntimeError("cannot assign to $$");
}
}
}